Notes for Slide 10
There is not very much you can do with the initial
value of a String variable. Inside your Java program you
are able to check to see if the contents of a variable
is null, and you can also output the value
of a variable even if it is null, but it will look the
same as if the variable had the actual String value consisting
of the four characters n, u, l, and l.
The reason why you use variables in you program is to store
values so that you can use these value later in your
program.
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